1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2013 Lennart Poettering
12 //#include "alloc-util.h"
15 //#include "fs-util.h"
18 //#include "parse-util.h"
19 //#include "process-util.h"
21 #include "signal-util.h"
22 //#include "stdio-util.h"
23 //#include "string-util.h"
25 /// Additional includes needed by elogind
26 #include "process-util.h"
28 static int prepare_handler(sd_event_source *s, void *userdata) {
29 log_info("preparing %c", PTR_TO_INT(userdata));
33 static bool got_a, got_b, got_c, got_unref;
34 static unsigned got_d;
36 static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
37 sd_event_source_unref(s);
42 static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
44 log_info("got IO on %c", PTR_TO_INT(userdata));
46 if (userdata == INT_TO_PTR('a')) {
47 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
50 } else if (userdata == INT_TO_PTR('b')) {
53 } else if (userdata == INT_TO_PTR('d')) {
56 assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
58 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
60 assert_not_reached("Yuck!");
65 static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
70 log_info("got child on %c", PTR_TO_INT(userdata));
72 assert_se(userdata == INT_TO_PTR('f'));
74 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
75 sd_event_source_unref(s);
80 static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
81 sd_event_source *p = NULL;
87 log_info("got signal on %c", PTR_TO_INT(userdata));
89 assert_se(userdata == INT_TO_PTR('e'));
91 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
99 assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
100 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
102 sd_event_source_unref(s);
107 static int defer_handler(sd_event_source *s, void *userdata) {
108 sd_event_source *p = NULL;
112 log_info("got defer on %c", PTR_TO_INT(userdata));
114 assert_se(userdata == INT_TO_PTR('d'));
116 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
118 assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
119 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
122 sd_event_source_unref(s);
127 static bool do_quit = false;
129 static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
130 log_info("got timer on %c", PTR_TO_INT(userdata));
132 if (userdata == INT_TO_PTR('c')) {
137 assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
138 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
144 assert_not_reached("Huh?");
149 static bool got_exit = false;
151 static int exit_handler(sd_event_source *s, void *userdata) {
152 log_info("got quit handler on %c", PTR_TO_INT(userdata));
159 static bool got_post = false;
161 static int post_handler(sd_event_source *s, void *userdata) {
162 log_info("got post handler");
169 static void test_basic(void) {
171 sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
172 static const char ch = 'x';
173 int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
177 assert_se(pipe(a) >= 0);
178 assert_se(pipe(b) >= 0);
179 assert_se(pipe(d) >= 0);
180 assert_se(pipe(k) >= 0);
182 assert_se(sd_event_default(&e) >= 0);
183 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
185 assert_se(sd_event_set_watchdog(e, true) >= 0);
187 /* Test whether we cleanly can destroy an io event source from its own handler */
189 assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
190 assert_se(write(k[1], &ch, 1) == 1);
191 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
192 assert_se(got_unref);
194 got_a = false, got_b = false, got_c = false, got_d = 0;
196 /* Add a oneshot handler, trigger it, re-enable it, and trigger
198 assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
199 assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
200 assert_se(write(d[1], &ch, 1) >= 0);
201 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
202 assert_se(got_d == 1);
203 assert_se(write(d[1], &ch, 1) >= 0);
204 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
205 assert_se(got_d == 2);
207 assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
208 assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
209 assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
210 assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
212 assert_se(sd_event_source_set_priority(x, 99) >= 0);
213 assert_se(sd_event_source_get_priority(x, &priority) >= 0);
214 assert_se(priority == 99);
215 assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
216 assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
217 assert_se(sd_event_source_set_priority(z, 50) >= 0);
218 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
219 assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
221 /* Test for floating event sources */
222 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
223 assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
225 assert_se(write(a[1], &ch, 1) >= 0);
226 assert_se(write(b[1], &ch, 1) >= 0);
228 assert_se(!got_a && !got_b && !got_c);
230 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
232 assert_se(!got_a && got_b && !got_c);
234 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
236 assert_se(!got_a && got_b && got_c);
238 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
240 assert_se(got_a && got_b && got_c);
242 sd_event_source_unref(x);
243 sd_event_source_unref(y);
246 assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
247 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
248 assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
249 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
251 assert_se(sd_event_loop(e) >= 0);
255 sd_event_source_unref(z);
256 sd_event_source_unref(q);
258 sd_event_source_unref(w);
268 static void test_sd_event_now(void) {
269 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
272 assert_se(sd_event_new(&e) >= 0);
273 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
274 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
275 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
276 if (clock_boottime_supported()) {
277 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
278 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
280 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
281 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
283 assert_se(sd_event_run(e, 0) == 0);
285 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
286 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
287 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
288 if (clock_boottime_supported()) {
289 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
290 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
292 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
293 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
296 static int last_rtqueue_sigval = 0;
297 static int n_rtqueue = 0;
299 static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
300 last_rtqueue_sigval = si->ssi_int;
305 static void test_rtqueue(void) {
306 sd_event_source *u = NULL, *v = NULL, *s = NULL;
309 assert_se(sd_event_default(&e) >= 0);
311 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
312 assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
313 assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
314 assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
316 assert_se(sd_event_source_set_priority(v, -10) >= 0);
318 assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
319 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
320 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
321 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
322 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
324 assert_se(n_rtqueue == 0);
325 assert_se(last_rtqueue_sigval == 0);
327 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
328 assert_se(n_rtqueue == 1);
329 assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
331 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
332 assert_se(n_rtqueue == 2);
333 assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
335 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
336 assert_se(n_rtqueue == 3);
337 assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
339 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
340 assert_se(n_rtqueue == 4);
341 assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
343 assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
344 assert_se(n_rtqueue == 4);
345 assert_se(last_rtqueue_sigval == 1);
347 sd_event_source_unref(u);
348 sd_event_source_unref(v);
349 sd_event_source_unref(s);
354 #define CREATE_EVENTS_MAX (70000U)
356 struct inotify_context {
357 bool delete_self_handler_called;
358 unsigned create_called[CREATE_EVENTS_MAX];
359 unsigned create_overflow;
360 unsigned n_create_events;
363 static void maybe_exit(sd_event_source *s, struct inotify_context *c) {
369 if (!c->delete_self_handler_called)
372 for (n = 0; n < 3; n++) {
375 if (c->create_overflow & (1U << n))
378 for (i = 0; i < c->n_create_events; i++)
379 if (!(c->create_called[i] & (1U << n)))
383 sd_event_exit(sd_event_source_get_event(s), 0);
386 static int inotify_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
387 struct inotify_context *c = userdata;
388 const char *description;
391 assert_se(sd_event_source_get_description(s, &description) >= 0);
392 assert_se(safe_atou(description, &n) >= 0);
397 if (ev->mask & IN_Q_OVERFLOW) {
398 log_info("inotify-handler <%s>: overflow", description);
399 c->create_overflow |= bit;
400 } else if (ev->mask & IN_CREATE) {
403 log_info("inotify-handler <%s>: create on %s", description, ev->name);
405 if (!streq(ev->name, "sub")) {
406 assert_se(safe_atou(ev->name, &i) >= 0);
408 assert_se(i < c->n_create_events);
409 c->create_called[i] |= bit;
411 } else if (ev->mask & IN_DELETE) {
412 log_info("inotify-handler <%s>: delete of %s", description, ev->name);
413 assert_se(streq(ev->name, "sub"));
415 assert_not_reached("unexpected inotify event");
421 static int delete_self_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
422 struct inotify_context *c = userdata;
424 if (ev->mask & IN_Q_OVERFLOW) {
425 log_info("delete-self-handler: overflow");
426 c->delete_self_handler_called = true;
427 } else if (ev->mask & IN_DELETE_SELF) {
428 log_info("delete-self-handler: delete-self");
429 c->delete_self_handler_called = true;
430 } else if (ev->mask & IN_IGNORED) {
431 log_info("delete-self-handler: ignore");
433 assert_not_reached("unexpected inotify event (delete-self)");
439 static void test_inotify(unsigned n_create_events) {
440 _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
441 sd_event_source *a = NULL, *b = NULL, *c = NULL, *d = NULL;
442 struct inotify_context context = {
443 .n_create_events = n_create_events,
449 assert_se(sd_event_default(&e) >= 0);
451 assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
453 assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context) >= 0);
454 assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
455 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
456 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
457 assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
458 assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);
460 assert_se(sd_event_source_set_description(a, "0") >= 0);
461 assert_se(sd_event_source_set_description(b, "1") >= 0);
462 assert_se(sd_event_source_set_description(c, "2") >= 0);
464 q = strjoina(p, "/sub");
465 assert_se(touch(q) >= 0);
466 assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);
468 for (i = 0; i < n_create_events; i++) {
469 char buf[DECIMAL_STR_MAX(unsigned)+1];
470 _cleanup_free_ char *z;
472 xsprintf(buf, "%u", i);
473 assert_se(z = strjoin(p, "/", buf));
475 assert_se(touch(z) >= 0);
478 assert_se(unlink(q) >= 0);
480 assert_se(sd_event_loop(e) >= 0);
482 sd_event_source_unref(a);
483 sd_event_source_unref(b);
484 sd_event_source_unref(c);
485 sd_event_source_unref(d);
490 int main(int argc, char *argv[]) {
492 log_set_max_level(LOG_DEBUG);
493 log_parse_environment();
499 test_inotify(100); /* should work without overflow */
500 test_inotify(33000); /* should trigger a q overflow */